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A50. HUGILL. MATIC AIR VALVE FOR GAS ENGINE MANLFOLDS.

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APPLICATION FILED JUNE 20. \918.

Patented May 13,1919.

ASHTON C. HUG-ILL, OF FORIDHAM, NEW YORK, ASSIGNOR, BY MESNEASSIGNMENTS, TO ALLIANCE CO. IN 0., OF BOSTON, MASSACHUSETTS, ACORPORATION OF DELAWARE.

AUTOMATIC AIR-VALVE FOR GAS-ENGINE MANIFOLDS.

Specification of Letters Patent. Patented May 13, 1919.

Application filed June 20, 1918. Serial No. 240,911.

To all whom it may concern:

Be it known that I, ASHTON C. HUGILL,

a citizen of the United States, residing at Fordham, in the county ofBronx and State of New York, have invented a new and useful Improvementin Automatic Air-Valves for Gas-Engine Manifolds, of which the followingis a specification.

The object of my invention is to provide a device which will admit airin limited quantities on the suction stroke of a gas engine and therebycause the air and gas mixture to be so proportioned that there will be aminimum use of hydrocarbon vapor or gas to produce a given power. Thisdevice is preferably applied direct to the manifold of a gas engine butmay be otherwise applied, if desired. This and other objects areaccomplished by my invention, one embodiment of which is hereinaftermore particularly set forth.

For a more specific description of my invention reference is to be hadto the accompanying drawings, forming a part hereof, in which:

Figure 1 is a sectional view of my improved device.

. Fig. 2 is an elevation of the same.

Fig. 3 is a sectional View taken on the line 33 of Fig. 1, looking inthe direction of the arrows.

Figs. 4 and 5 show a spring valve plug which closes the intake openingof the device.

Throughout the Various views of the drawings, similar referencecharacters, designate similar parts.

My improved automatic valve 1 is attached to any manifold, or othersuitable part 2, and is composed of a hollow plug 3 which has a reducedlower end which is secured to the manifold 2 by screw threads orotherwise as desired, and placed therein is a regulating screw 4 bymeans of which the size of the opening through the plug 3 may beregulated. The top of the plug 3 is provided with screw threads toreceive corresponding threads on a, cap 5 with a concave top which has aperforation 6 at its upper extremity. This perforation 6 is normallyclosed by a spring valve plug 7 which surmounts a coil spring 8 thatrests on the top of the plug 3 and holds the spring valve plug 7 againstthe cap5 with a gentle pressure which will be readily overcome bysuction through the bore of the plug 3.

The spring valve plug 7 may be made in any suitable manner provided itconforms to the cap 5 and it is preferably made with its upper portionformed so as to fit the concave surface of this cap 5 and it has grooves10 at its edge so as to provide suitable passages for air to passthrough and it is also provided with upwardly extending lugs 9 whichextend far enough to engage the top of the plug 3 before the spring 8 iscompressed to any injurious extent and so protect this spring frominjury during the operation of the apparatus. It will be noted that theconcavo-convex surfaces of the cap 5 and valve plug 7 engage to form atight joint without blnding so that leakage is prevented and yetatmospheric air may easily enter through the vent 6 whenever there is asufiicient vacuum in the cap 5.

In view of the foregoing, the action of my improved valve will bereadily understood, assuming that there is a suction stroke of an engineto which this device is attached as above described, the suction willmake a partial vacum in the cap 5 and thereby cause the valve plug 7 tobe lowered by air pressure through the opening 6 and this will permit aready flow of air about the cap 7 and through the bore in the plug 3 tothe engine through the usual path. The amount of air that may pass isdetermined by the position of the screw 4. When suflicient air hasentered, the spring 8 will act to close the vent and this cycle ofoperations is repeated as long as the device is in use. I have foundthat the addition of my improved device, without any other changewhatsoever, will reduce gas consumption from 30 to 50%.

While I have shown one embodiment of my invention, it is obvious that itis not restricted thereto, but is broad enough to cover all structuresthat come within the scope of the annexed claim.

What I claim is:

In a device of the class described, a perforated plug adapted to besecured to a manifold or similar means and means in said plug forregulating the size of the perforation therein, a spring, a cap with aconcave top mounted on said plug and vent open- I rest on said springand to press against and the valve plug may move undeic atmospheric 7 Ifit the interior of the cap, and lugs which pressure through the ventand permit alr to extend far enough from' the valve plug to pass throughthe device. 10

engage the plugand protect the spring, said In testimony whereof I have-hereunto 5 parts being so arranged and disposed that afiixed mysignature.

the valve plug slides freely in the plug and r V Y normally closes,thevent therein, and that ASHTON C. HUGILL.

"Copies of this patent maybe obtained for five cents each, by addressingthe Gommissionen of Patents,

Washington, D. G. I V

